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Número de pieza | LB1824 | |
Descripción | Power Brushless Motor Driver for OA Equipment | |
Fabricantes | Sanyo | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de LB1824 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
No Preview Available ! Ordering number : EN4264A
Monolithic Digital IC
LB1824
Power Brushless Motor Driver
for OA Equipment
Overview
The LB1824 produces the direct PWM drive output
appropriate for the brushless motors used in office data
processing (OA) equipment, and integrates on a single
chip the speed control circuits, FG amplifier, and other
circuits required to form the drive circuit.
Features
• Breakdown voltage: 30 V, output current: 2.5 A
• Direct PWM drive output
• Crystal oscillator circuit
• Speed discriminator plus PLL speed control system
• Forward/reverse switching circuit
• Start/stop switching circuit
• Current control circuit
• Overheating protection circuit
• Built-in FG amplifier
• Lock detection output
Package Dimensions
unit: mm
3147A-DIP28HS
[LB1824]
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Output current
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VCC max
VM max
IO max
Pd max1
Pd max2
Topr
Tstg
Conditions
T ≤ 100 ms
The IC independently
With an arbitrary large heat sink
Ratings
30
30
2.5
3
20
–20 to +80
–55 to +150
Allowable Operating Ranges at Ta = 25°C
Parameter
Supply voltage range
Supply voltage range
FG Schmitt output, applied voltage
Fixed voltage output current
FG Schmitt output, output current
Lock detection output current
Symbol
VCC
VM
VFGS
IO1
IO2
IO3
IFGS
ILD
Conditions
7 V output
5 V output
4 V output
Ratings
9.5 to 28
9 to 28
0 to 8
0 to –20
0 to –20
0 to –15
0 to 5
0 to 20
Unit
V
V
A
W
W
°C
°C
Unit
V
V
V
mA
mA
mA
mA
mA
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
93097HA (OT) / 52893TS A8-8630 No. 4264-1/9
1 page LB1824
Logic Table
Parameter
1
2
3
4
5
6
Source → Sink
OUT3 → OUT2
OUT3 → OUT1
OUT2 → OUT3
OUT1 → OUT2
OUT2 → OUT1
OUT1 → OUT3
F/R = Low
IN1 IN2 IN3
HH L
HL L
L LH
LHL
HLH
L HH
F/R = High
IN1 IN2 IN3
L LH
L HH
HH L
HLH
LHL
HL L
Note: ‘H’ for an input indicates the state where IN+ > IN–.
H: High
L: Low
The formula below gives the relationship between the crystal oscillator frequency (fOSC) and the FG frequency (fFG).
fFG (servo) = fOSC/(the ECL divider factor (16) × the number of counts)
= fOSC/8192
(External crystal oscillator circuit)
Pin Functions
External Constants (reference values)
X’tal (MHz)
3 to 4
C1 (pF)
39
C2 (pF)
82
R (kΩ)
0.82
4 to 5
39 82
1.0
5 to 7
39 47
1.5
7 to 10
39 27
2.0
Note that the crystal used should have a ratio between the fundamental
wave fO impedance and 3fO impedance of 1:5 or greater.
Pin name
IN1+, IN1–
IN2+, IN2–
IN3+, IN3–
OUT1
OUT2
OUT3
VCC
VM
GND1
GND2
CR
INT IN
INT OUT
D OUT
P OUT
LD
FG IN+
FG IN–
FG OUT
FGS OUT
X’tal
5V
7V
S/S
F/R
Pin No.
20, 19
18, 17
16, 15
8
9
10
3
14
22
11
7
25
26
24
27
23
4
5
6
28
21
1
2
13
12
Function
OUT1 Hall input pin
OUT2 Hall input pin
OUT3 Hall input pin
Output pin 1
Output pin 2
Output pin 3
Pin for the power supply applied to all blocks other than the output block
Output block power supply pin. Also used for output current detection: connecting a resistor
(Rf) between this pin and VCC allows the output current to be detected as a voltage.
Ground for all blocks other than the output block
Output block ground
Pin for setting the PWM oscillator frequency
Integrator input pin
Integrator output pin (speed control pin)
Speed discriminator output pin: overspeed → high
PLL output pin
Lock detection pin. Open collector output. Goes low when the motor speed is within the lock
range (±6.25%).
FG pulse input pin (4 V power supply pin)
FG amplifier output pin
FG amplifier output pin (post-schmitt). Open collector output.
Crystal oscillator pin. Connect the crystal oscillator to this pin.
5 V power supply pin
7 V power supply pin
Start/stop control pin
Start → low, stop → high
Forward/reverse control pin
Forward → low, reverse → high
No. 4264-5/9
5 Page |
Páginas | Total 9 Páginas | |
PDF Descargar | [ Datasheet LB1824.PDF ] |
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